Fastener



FIG. 1 is an isometric view of a fastener showing my new design;

FIG. 2 is a right view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a front side view thereof;

FIG. 5 is a rear side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

CLAIM The ornamental design for a fastener, as shown and described.